Perhaps you should try some spelling variations:
dong thanh » truong thanh
hanh tran » hanh trang, thanh tran, hanh tram
tran tuan » tran xuan, tran quang, tran thanh
tuan hung » tran hung, luan hung, tuan dung
hoc dieu » hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc dieu) or (ho chieu)) sach - hanh tran tuan hung ((cong san) or (dong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (ho chieu)) sach - hanh tran tuan hung ((cong san) OR (dong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (ho chieu)) sach - hanh tran tuan hung ((cong san) or (dong thanh)) toan cau*.